Buggy code:
private static WorkbenchTestable testableObject ; private Display display ; private WindowManager windowManager ; private WorkbenchWindow activatedWindow ; private EditorHistory editorHistory ; private boolean runEventLoop = true ; private boolean isStarting = true ; private boolean isClosing = false ; private int returnCode = PlatformUI . RETURN_UNSTARTABLE ; private ListenerList windowListeners = new ListenerList ( ) ; private WorkbenchAdvisor advisor ; private WorkbenchConfigurer workbenchConfigurer ; private ExtensionEventHandler extensionEventHandler ; private int largeUpdates = 0 ; final Map services = new HashMap ( ) ; private int progressCount = - 1 ; private WorkbenchWindow [ ] createdWindows ; private Workbench ( Display display , WorkbenchAdvisor advisor ) { } public static final Workbench getInstance ( ) { } public static final int createAndRunWorkbench ( Display display , WorkbenchAdvisor advisor ) { } public static Display createDisplay ( ) { } public static WorkbenchTestable getWorkbenchTestable ( ) { } public void addWindowListener ( IWindowListener l ) { } public void removeWindowListener ( IWindowListener l ) { } protected void fireWindowOpened ( final IWorkbenchWindow window ) { } protected void fireWindowClosed ( final IWorkbenchWindow window ) { } protected void fireWindowActivated ( final IWorkbenchWindow window ) { } protected void fireWindowDeactivated ( final IWorkbenchWindow window ) { } private boolean busyClose ( final boolean force ) { } public boolean saveAllEditors ( boolean confirm ) { } private IWorkbenchWindow busyOpenWorkbenchWindow ( String perspID , IAdaptable input ) throws WorkbenchException { } public boolean close ( ) { } boolean close ( int returnCode , final boolean force ) { } public IWorkbenchWindow getActiveWorkbenchWindow ( ) { } protected EditorHistory getEditorHistory ( ) { } public IEditorRegistry getEditorRegistry ( ) { } private int getNewWindowNumber ( ) { } public IWorkbenchOperationSupport getOperationSupport ( ) { } public IPerspectiveRegistry getPerspectiveRegistry ( ) { } public PreferenceManager getPreferenceManager ( ) { } public IPreferenceStore getPreferenceStore ( ) { } public ISharedImages getSharedImages ( ) { } WindowManager getWindowManager ( ) { } private File getWorkbenchStateFile ( ) { } public int getWorkbenchWindowCount ( ) { } public IWorkbenchWindow [ ] getWorkbenchWindows ( ) { } public IWorkingSetManager getWorkingSetManager ( ) { } public ILocalWorkingSetManager createLocalWorkingSetManager ( ) { } private boolean init ( Display display ) { } private void initializeCommandResolver ( ) { } private void initializeApplicationColors ( ) { } private void initializeSingleClickOption ( ) { } private void initializeFonts ( ) { } private static void initializeImages ( ) { } private void uninitializeImages ( ) { } private void initializeColors ( ) { } public boolean isClosing ( ) { } public boolean isStarting ( ) { } private WorkbenchWindow newWorkbenchWindow ( ) { } private void forceOpenPerspective ( ) { } void openFirstTimeWindow ( ) { } private void runStartupWithProgress ( final int expectedProgressCount , final Runnable runnable ) throws InterruptedException , InvocationTargetException { } private void doOpenFirstTimeWindow ( ) { } IStatus restoreState ( ) { } public IWorkbenchWindow openWorkbenchWindow ( IAdaptable input ) throws WorkbenchException { } public IWorkbenchWindow openWorkbenchWindow ( final String perspID , final IAdaptable input ) throws WorkbenchException { } IWorkbenchWindow restoreWorkbenchWindow ( IMemento memento ) throws WorkbenchException { } private XMLMemento recordWorkbenchState ( ) { } public boolean restart ( ) { } private IStatus restoreState ( final IMemento memento ) throws InterruptedException , InvocationTargetException { } public String [ ] getEarlyActivatedPlugins ( ) { } public String [ ] getDisabledEarlyActivatedPlugins ( ) { } private void startPlugins ( ) { IExtensionRegistry registry = Platform . getExtensionRegistry ( ) ; IExtensionPoint point = registry . getExtensionPoint ( PLUGIN_ID , PL_STARTUP ) ; final IExtension [ ] extensions = point . getExtensions ( ) ; if ( ( extensions . length ) == 0 ) { return ; } Job job = new Job ( "Workbench<seq2seq4repair_space>early<seq2seq4repair_space>startup" ) { protected IStatus run ( IProgressMonitor monitor ) { HashSet disabledPlugins = new HashSet ( Arrays . asList ( getDisabledEarlyActivatedPlugins ( ) ) ) ; monitor . beginTask ( Workbench_startingPlugins , extensions . length ) ; for ( int i = 0 ; i < ( extensions . length ) ; ++ i ) { <START_BUG> if ( ( monitor . isCanceled ( ) ) || ( ! ( PlatformUI . isWorkbenchRunning ( ) ) ) ) { <END_BUG> return Status . CANCEL_STATUS ; } IExtension extension = extensions [ i ] ; if ( ! ( disabledPlugins . contains ( extension . getNamespace ( ) ) ) ) { monitor . subTask ( extension . getNamespace ( ) ) ; Platform . run ( new EarlyStartupRunnable ( extension ) ) ; } monitor . worked ( 1 ) ; } monitor . done ( ) ; return Status . OK_STATUS ; } public boolean belongsTo ( Object family ) { return Workbench . EARLY_STARTUP_FAMILY . equals ( family ) ; } } ; job . setSystem ( true ) ; job . schedule ( ) ; } private int runUI ( ) { } private void runEventLoop ( Window . IExceptionHandler handler , Display display ) { } private IStatus saveState ( IMemento memento ) { } private boolean saveMementoToFile ( XMLMemento memento ) { } public IWorkbenchPage showPerspective ( String perspectiveId , IWorkbenchWindow window ) throws WorkbenchException { } public IWorkbenchPage showPerspective ( String perspectiveId , IWorkbenchWindow window , IAdaptable input ) throws WorkbenchException { } private void shutdown ( ) { } private void cancelEarlyStartup ( ) { } public IDecoratorManager getDecoratorManager ( ) { } private WorkbenchWindow getActivatedWindow ( ) { } void setActivatedWindow ( WorkbenchWindow window ) { } WorkbenchConfigurer getWorkbenchConfigurer ( ) { } WorkbenchAdvisor getAdvisor ( ) { } public Display getDisplay ( ) { } public String getDefaultPerspectiveId ( ) { } public IAdaptable getDefaultPageInput ( ) { } public String getMainPreferencePageId ( ) { } public IElementFactory getElementFactory ( String factoryId ) { } public IProgressService getProgressService ( ) { } private WorkbenchActivitySupport workbenchActivitySupport ; private WorkbenchCommandSupport workbenchCommandSupport ; private WorkbenchContextSupport workbenchContextSupport ; private BindingManager bindingManager ;

Fix:
if ( ( monitor . isCanceled ( ) ) || ( ! ( isRunning ( ) ) ) ) {